What happens to takeoff roll distance if an aircraft's air conditioner rated 'for ground use only' remains on?

When an aircraft's air conditioner rated 'for ground use only' remains on during takeoff, the engine's performance is affected because the air conditioning system draws power from the aircraft's engines. This additional load increases the total thrust required to achieve takeoff. Consequently, the aircraft must generate additional lift and thrust to overcome the increased drag and weight caused by the running air conditioning system.

As a result, the takeoff roll distance increases because the aircraft requires a longer distance on the runway to reach the necessary speed for takeoff. Pilots must consider this additional factor, especially in hot weather or when operating at high elevations, where aircraft performance may already be compromised.

In summary, keeping the ground-use-only air conditioner on during takeoff negatively impacts the aircraft's efficiency, leading to an increased takeoff distance.